Move 'snippet' queries to 'snippets' folders

cpp/ql/examples/snippets/unusedparam.ql

@@ -0,0 +1,12 @@
+/**
+ * @name Unused parameter
+ * @description Finds parameters that are not accessed
+ * @tags parameter
+ *       access
+ */
+
+import cpp
+
+from Parameter p
+where p.isNamed() and not exists(p.getAnAccess())
+select p